Venous PressurePortal PressureHypertension, PortalHepatic VeinsLiver CirrhosisAzygos VeinEsophageal and Gastric VaricesLiver CirculationGastrointestinal HemorrhageElasticity Imaging TechniquesReproducibility of ResultsHemodynamicsSeverity of Illness IndexSensitivity and SpecificityTime FactorsObserver VariationReference ValuesCalibrationEquipment DesignProspective StudiesAlgorithmsImage Processing, Computer-AssistedImaging, Three-DimensionalLuminescent MeasurementsModels, BiologicalKineticsPredictive Value of TestsAnthropometryBlood Flow VelocityBlood Pressure DeterminationAnalysis of VarianceBiological MarkersPhantoms, ImagingMagnetic Resonance ImagingMethodsLung Volume MeasurementsBlood PressureEquipment Failure AnalysisOxygenLinear ModelsReference StandardsRegression AnalysisComputer SimulationImage Interpretation, Computer-AssistedPressureHydrogen-Ion ConcentrationSpectrometry, FluorescenceMagnetic Resonance SpectroscopyWaterPregnancyMonitoring, PhysiologicDimensional Measurement AccuracyBiomechanical PhenomenaFluorescent DyesTemperatureMathematicsTransducersUltrasonographyElectric ImpedanceModels, TheoreticalCross-Sectional StudiesEnvironmental MonitoringPain MeasurementScattering, RadiationUltrasonography, PrenatalTransducers, PressureWeights and MeasuresTomography, X-Ray ComputedFollow-Up StudiesLasersCarbon DioxideRisk FactorsCephalometryFeasibility StudiesModels, StatisticalTreatment OutcomeDiagnostic Techniques, OphthalmologicalBody Weights and MeasuresBiometryIndicator Dilution TechniquesRegional Blood FlowBrainROC CurveQuality ControlOptics and PhotonicsArtifactsOxygen ConsumptionCohort StudiesEvaluation Studies as TopicQuestionnairesRetrospective StudiesTomography, Optical CoherenceFluorescenceImage EnhancementInterferometryGestational AgeBody WeightData Interpretation, StatisticalElectrodesElasticity